Ideas

Plugin and Theme Directory: Filter by compatibility

Let users filter plugins that are no longer supported. I'd imagine something like this: Developers have to supply specific versions in their metadata likeCompatibilitylist: 2.6.0 2.6.1 (and so on) 2.7.1
Users could then mark a checkbox "Only show plugins compatible with the current version of wordpress".

The WordPress-Internal search might filter the incompatible one automatically.

Of course, we would see many updates to plugins which would only be used to "bump" the version, but then again you could easily see which plugins are actively maintained and which not.

Oh boy, do I look forward to this! There are plugins and themes that just "hang around", given little or no attention from their owners, sort of like stray pets. At present, interested parties can only pick them up and try them. If we knew an offering hadn't yet been approved for 2.7, we could save time and avoid risky behavior.